Updates TA to splunk-otel-collector v0.128.0 and marks TA as v1.4.3 #13857

Job	Run time
tidy	1m 57s
gofmt	3m 24s
generate-metrics	1m 39s
lint	7m 33s
coverage	12m 16s
cross-compile (binaries-darwin_amd64) / compile	6m 40s
cross-compile (binaries-darwin_arm64) / compile	6m 28s
cross-compile (binaries-linux_arm64) / compile	5m 56s
cross-compile (binaries-linux_amd64) / compile	1m 34s
cross-compile (binaries-windows_amd64) / compile	6m 31s
cross-compile (binaries-linux_ppc64le) / compile	6m 11s
unit-test (macos-13-xlarge) / unit-test	3m 51s
unit-test (macos-13) / unit-test	14m 17s
unit-test (macos-14) / unit-test	5m 34s
unit-test (macos-15) / unit-test	4m 14s
unit-test (ubuntu-24.04) / unit-test	9m 40s
	1h 37m 45s

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