Move hook manager registration to API package

[Nevay]

Makes extension hook manager available via SPI even if SDK is not installed.

Not removing registration in SDK to not break API 1.1.0 w/ SDK >1.1.0.

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.79%. Comparing base (cd8c0e3) to head (ae7ec6c). Report is 1 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) ```diff @@ Coverage Diff @@ ## main #1402 +/- ## ============================================ - Coverage 73.85% 73.79% -0.07% Complexity 2672 2672 ============================================ Files 386 386 Lines 7650 7650 ============================================ - Hits 5650 5645 -5 - Misses 2000 2005 +5 ``` | [Flag](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) | Coverage Δ | | |---|---|---| | [8.1](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) | `73.49% <ø> (-0.01%)` | :arrow_down: | | [8.2](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) | `73.73% <ø> (-0.08%)` | :arrow_down: | | [8.3](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) | `73.64% <ø> (-0.02%)` | :arrow_down: | | [8.4](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) | `73.67% <ø> (-0.04%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry#carryforward-flags-in-the-pull-request-comment) to find out more. [see 6 files with indirect coverage changes](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry). Last update [cd8c0e3...ae7ec6c](https://app.codecov.io/gh/open-telemetry/opentelemetry-php/pull/1402?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-telemetry).