Simplify feebuff landing page #5894

Job	Run time
build-and-check	2m 59s
test-integration-packages/billing	1m 1s
test-integration-packages/internal	1m 2s
test-integration-packages/agent-runtime	46s
test-integration-sdk	1m 20s
test-integration-web	52s
test-integration-common	41s
test-web	48s
test-sdk	47s
test-cli	47s
test-packages/agent-runtime	46s
test-.agents	50s
test-integration-cli	44s
test-common	41s
test-packages/billing	42s
test-packages/internal	42s
	15m 28s

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