Small improvements to native terminal colors #5202

Job	Run time
build-and-check	2m 27s
test-integration-.agents	1m 15s
test-common	44s
test-web	51s
test-sdk	57s
test-cli	1m 13s
test-packages/internal	42s
test-integration-packages/internal	37s
test-integration-sdk	52s
test-.agents	46s
test-integration-common	41s
test-integration-packages/agent-runtime	50s
test-integration-packages/billing	40s
test-packages/agent-runtime	58s
test-integration-web	48s
test-integration-cli	38s
test-packages/billing	41s
	15m 40s

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