Remove evalbuff and expensivebuff #6038

Job	Run time
build-and-check	3m 4s
test-integration-packages/internal	1m 4s
test-integration-packages/billing	1m 13s
test-integration-web	44s
test-integration-sdk	1m 25s
test-integration-common	51s
test-integration-packages/agent-runtime	44s
test-common	48s
test-cli	55s
test-packages/agent-runtime	41s
test-web	52s
test-packages/internal	49s
test-integration-cli	43s
test-.agents	44s
test-sdk	48s
test-packages/billing	46s
	16m 11s

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