feat(ansible): add pgBackRest tasks and configurations #4379

Job	Run time
build-run-image (blacksmith-32vcpu-ubuntu-2404, amd64)	2m 20s
build-run-image (blacksmith-32vcpu-ubuntu-2404-arm, arm64)	3m 10s
build-run-image (macos-latest-xlarge, arm64)	4m 1s
run-tests / prepare	37s
run-testinfra / prepare	36s
run-testinfra / test-ami-nix ("orioledb-17")	13m 26s
run-testinfra / test-ami-nix ("15")	39m 28s
run-testinfra / test-ami-nix ("17")	49m 49s
run-tests / build ("15")	2m 2s
run-tests / build ("orioledb-17")	1m 58s
run-tests / build ("17")	1m 52s
build-run-image (blacksmith-32vcpu-ubuntu-2404-arm, arm64)	3m 10s
build-run-image (macos-latest-xlarge, arm64)	4m 1s
build-run-image (blacksmith-32vcpu-ubuntu-2404, amd64)	2m 20s
run-testinfra / test-ami-nix ("15")	39m 49s
run-testinfra / test-ami-nix ("orioledb-17")	48m 24s
run-tests / build ("15")	2m 2s
run-testinfra / test-ami-nix ("17")	49m 49s
run-testinfra / prepare	36s
run-tests / build ("orioledb-17")	1m 58s
run-tests / prepare	37s
run-tests / build ("17")	1m 52s
	4h 33m 57s

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