refactor(release): switch release integrity to be dynamic

[alexeagle]

This matches rules_py as documented by
https://blog.aspect.build/releasing-bazel-rulesets-rust

It has the benefit that developers no longer get yelled at to vendor some updated integrity hashes into bazel-lib every time they touch the Go sources.

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Changes are visible to end-users: no

Test plan

Validated on https://github.com/alexeagle/bazel-lib/releases
downloading the latest release and cracking it open looks right.

[aspect-workflows]

Test

4 test targets passed

Targets

//lib/tests/copy_to_directory_bin_action:test [k8-fastbuild]            29ms
//lib/tests/jq:check_stamped [k8-fastbuild]                             321ms
//lib/tests/run_binary_expansions:expansions_golden_test [k8-fastbuild] 225ms
//lib/tests/yq:check_stamped [k8-fastbuild]                             379ms

Total test execution time was 954ms. 211 tests (98.1%) were fully cached saving 43s.

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Test

e2e/copy_action

All tests were cache hits

1 test (100.0%) was fully cached saving 73ms.

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Test

e2e/copy_to_directory

All tests were cache hits

6 tests (100.0%) were fully cached saving 583ms.

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Test

e2e/coreutils

All tests were cache hits

4 tests (100.0%) were fully cached saving 423ms.

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Test

e2e/external_copy_to_directory

All tests were cache hits

1 test (100.0%) was fully cached saving 73ms.

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Test

e2e/smoke

All tests were cache hits

6 tests (100.0%) were fully cached saving 2s.

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Buildifier      Format      Gazelle

[gregmagolan]

🧙