feat: add otel server support

[jbedard]

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Changes are visible to end-users: yes/no

• Searched for relevant documentation and updated as needed: yes/no
• Breaking change (forces users to change their own code or config): yes/no
• Suggested release notes appear below: yes/no

Test plan

• Covered by existing test cases
• New test cases added
• Manual testing; please provide instructions so we can reproduce:

[aspect-workflows]

Test

22 test targets passed

Targets

//integration_tests/aspect:configure_test [k8-fastbuild] 1m 47s
//integration_tests/aspect:flags_test [k8-fastbuild]     1m 54s
//integration_tests/aspect:help_test [k8-fastbuild]      1m 46s
//integration_tests/aspect:hints_test [k8-fastbuild]     1m 42s
//integration_tests/aspect:info_test [k8-fastbuild]      1m 27s
//integration_tests/aspect:init_test [k8-fastbuild]      49s
//integration_tests/aspect:lint_test [k8-fastbuild]      59s
//integration_tests/aspect:reenter_test [k8-fastbuild]   33s
//integration_tests/aspect:run_test [k8-fastbuild]       59s
//integration_tests/aspect:version_test [k8-fastbuild]   1m 29s
//pkg/aspect/aquery:aquery_test [k8-fastbuild]           40ms
//pkg/aspect/build:build_test [k8-fastbuild]             225ms
//pkg/aspect/clean:clean_test [k8-fastbuild]             72ms
//pkg/aspect/cquery:cquery_test [k8-fastbuild]           88ms
//pkg/aspect/lint:lint_test [k8-fastbuild]               98ms
//pkg/aspect/outputs:outputs_test [k8-fastbuild]         73ms
//pkg/aspect/run:run_test [k8-fastbuild]                 92ms
//pkg/aspect/test:test_test [k8-fastbuild]               287ms
//pkg/aspect/version:version_test [k8-fastbuild]         60ms
//pkg/bazel:bazel_test [k8-fastbuild]                    1s
//pkg/plugin/system/bep:bep_test [k8-fastbuild]          113ms
//pkg/plugin/system:system_test [k8-fastbuild]           51ms

Total test execution time was 13m 30s. 81 tests (78.6%) were fully cached saving 7s.

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