[UX] Improve `dstack fleet` output layout #6369

Job	Run time
compute-version	2s
build-docs / build-docs	1m 20s
build-artifacts / code-lint	51s
build-artifacts / gateway-build	11s
build-artifacts / runner-test (ubuntu-latest)	52s
build-artifacts / frontend-build	12s
build-artifacts / runner-test (macos-latest)	1m 10s
build-artifacts / generate-json-schema	16s
build-artifacts / python-build	19s
build-artifacts / python-test (macos-latest, 3.12)	3m 27s
build-artifacts / python-test (macos-latest, 3.10)	3m 29s
build-artifacts / python-test (macos-latest, 3.9)	3m 52s
build-artifacts / python-test (macos-latest, 3.11)	2m 14s
build-artifacts / python-test (macos-latest, 3.13)	3m 16s
build-artifacts / python-test (ubuntu-latest, 3.10)	5m 8s
build-artifacts / python-test (windows-latest, 3.9)	2m 0s
build-artifacts / python-test (windows-latest, 3.10)	2m 7s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 51s
build-artifacts / python-test (windows-latest, 3.12)	2m 32s
build-artifacts / python-test (ubuntu-latest, 3.9)	5m 11s
build-artifacts / python-test (windows-latest, 3.13)	2m 10s
build-artifacts / python-test (windows-latest, 3.11)	2m 11s
build-artifacts / python-test (ubuntu-latest, 3.12)	5m 23s
build-artifacts / python-test (ubuntu-latest, 3.11)	4m 57s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	35s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	30s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	14s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	25s
	59m 45s

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