Bump docker/build-push-action to v6 #4849

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	4m 43s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	24s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 0s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	4m 2s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	5m 59s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 14s
Dry Run Goreleaser	7m 38s
Test Getting started	7m 24s
Check Go Generate (datacatalog) / Go Generate	1m 22s
Check Go Generate (flyteadmin) / Go Generate	2m 2s
Check Go Generate (flytecopilot) / Go Generate	1m 19s
Check Go Generate (flytectl) / Go Generate	2m 9s
Check Go Generate (flytepropeller) / Go Generate	2m 12s
Lint (datacatalog) / Run Lint	2m 16s
Lint (flyteadmin) / Run Lint	2m 49s
Lint (flytectl) / Run Lint	2m 31s
Lint (flyteidl) / Run Lint	1m 45s
Lint (flyteplugins) / Run Lint	2m 56s
Lint (flytepropeller) / Run Lint	2m 51s
Lint (flytestdlib) / Run Lint	2m 18s
Unit Tests (datacatalog) / Run Unit Test	2m 46s
Unit Tests (flyteadmin) / Run Unit Test	4m 20s
Unit Tests (flytecopilot) / Run Unit Test	2m 26s
Unit Tests (flytectl) / Run Unit Test	3m 23s
Unit Tests (flyteplugins) / Run Unit Test	3m 53s
Unit Tests (flytepropeller) / Run Unit Test	4m 10s
Unit Tests (flytestdlib) / Run Unit Test	3m 33s
Integration Test (flyteadmin) / Integration tests	6m 19s
	1h 36m 45s

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