build: bazel bundles, release artifacts and lsp & e2e tests

[gregmagolan]

//integration/lsp:test now tested on CI as well:

//client/src/tests:test                                                  PASSED in 0.7s
//common/tests:test                                                      PASSED in 0.6s
//integration/lsp:test                                                   PASSED in 129.9s
//server/src/tests:test                                                  PASSED in 2.2s
//syntaxes/test:test                                                     PASSED in 3.5s

//integration/e2e:test can be run locally but not yet added to CI

release vsix artifact is built but not yet tested; planning to test this artifact in a follow-up.

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