[processor/interval] unexport Processor (open-telemetry#40273)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
Unexport Processor struct.

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: 2 people

.chloggen/unexport_intervalprocessor.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: intervalprocessor
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Unexport Processor
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [40273]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [api]

processor/intervalprocessor/processor.go

@@ -20,9 +20,9 @@ import (
 	"github.com/open-telemetry/opentelemetry-collector-contrib/processor/intervalprocessor/internal/metrics"
 )
 
-var _ processor.Metrics = (*Processor)(nil)
+var _ processor.Metrics = (*intervalProcessor)(nil)
 
-type Processor struct {
+type intervalProcessor struct {
 	ctx    context.Context
 	cancel context.CancelFunc
 	logger *zap.Logger
@@ -43,10 +43,10 @@ type Processor struct {
 	nextConsumer consumer.Metrics
 }
 
-func newProcessor(config *Config, log *zap.Logger, nextConsumer consumer.Metrics) *Processor {
+func newProcessor(config *Config, log *zap.Logger, nextConsumer consumer.Metrics) *intervalProcessor {
 	ctx, cancel := context.WithCancel(context.Background())
 
-	return &Processor{
+	return &intervalProcessor{
 		ctx:    ctx,
 		cancel: cancel,
 		logger: log,
@@ -68,7 +68,7 @@ func newProcessor(config *Config, log *zap.Logger, nextConsumer consumer.Metrics
 	}
 }
 
-func (p *Processor) Start(_ context.Context, _ component.Host) error {
+func (p *intervalProcessor) Start(_ context.Context, _ component.Host) error {
 	exportTicker := time.NewTicker(p.config.Interval)
 	go func() {
 		for {
@@ -85,16 +85,16 @@ func (p *Processor) Start(_ context.Context, _ component.Host) error {
 	return nil
 }
 
-func (p *Processor) Shutdown(_ context.Context) error {
+func (p *intervalProcessor) Shutdown(_ context.Context) error {
 	p.cancel()
 	return nil
 }
 
-func (p *Processor) Capabilities() consumer.Capabilities {
+func (p *intervalProcessor) Capabilities() consumer.Capabilities {
 	return consumer.Capabilities{MutatesData: true}
 }
 
-func (p *Processor) ConsumeMetrics(ctx context.Context, md pmetric.Metrics) error {
+func (p *intervalProcessor) ConsumeMetrics(ctx context.Context, md pmetric.Metrics) error {
 	var errs error
 
 	p.stateLock.Lock()
@@ -201,7 +201,7 @@ func aggregateDataPoints[DPS metrics.DataPointSlice[DP], DP metrics.DataPoint[DP
 	}
 }
 
-func (p *Processor) exportMetrics() {
+func (p *intervalProcessor) exportMetrics() {
 	md := func() pmetric.Metrics {
 		p.stateLock.Lock()
 		defer p.stateLock.Unlock()
@@ -228,7 +228,7 @@ func (p *Processor) exportMetrics() {
 	}
 }
 
-func (p *Processor) getOrCloneMetric(rm pmetric.ResourceMetrics, sm pmetric.ScopeMetrics, m pmetric.Metric) (pmetric.Metric, identity.Metric) {
+func (p *intervalProcessor) getOrCloneMetric(rm pmetric.ResourceMetrics, sm pmetric.ScopeMetrics, m pmetric.Metric) (pmetric.Metric, identity.Metric) {
 	// Find the ResourceMetrics
 	resID := identity.OfResource(rm.Resource())
 	rmClone, ok := p.rmLookup[resID]

processor/intervalprocessor/processor_test.go

@@ -66,8 +66,8 @@ func TestAggregation(t *testing.T) {
 			err = mgp.ConsumeMetrics(ctx, md)
 			require.NoError(t, err)
 
-			require.IsType(t, &Processor{}, mgp)
-			processor := mgp.(*Processor)
+			require.IsType(t, &intervalProcessor{}, mgp)
+			processor := mgp.(*intervalProcessor)
 
 			// Pretend we hit the interval timer and call export
 			processor.exportMetrics()