Add required env variables for e2e telemetry tests to README (#8341) #19944

Job	Run time
generate-headers	1m 2s
build-mv2	3m 15s
build-mv3	3m 8s
lint	4m 8s
dead-code	1m 39s
test	5m 33s
types	1m 32s
end-to-end-tests	11m 0s
Inclusiveness-Analyser-scan	3s
end-to-end-tests-mv3	13m 41s
prettier	31s
upload-to-codecov	21s
	45m 53s

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