Avoid creating tasks to load integration platforms that do not exist

[bdraco]

~~needs https://github.com/home-assistant/core/pull/110751~~ needs #110766

Proposed change

Instead of checking if the integration platform exists in the task we now check before creating the task. This avoids hundreds (almost 1000) tasks at startup. This is where most startup tasks come from. It even beat out ConfigEntries.async_forward_entry_setup

Type of change

• [ ] Dependency upgrade
• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New integration (thank you!)
• [ ] New feature (which adds functionality to an existing integration)
• [ ] Deprecation (breaking change to happen in the future)
• [ ] Breaking change (fix/feature causing existing functionality to break)
• [x] Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• [x] The code change is tested and works locally.
• [ ] Local tests pass. Your PR cannot be merged unless tests pass
• [ ] There is no commented out code in this PR.
• [ ] I have followed the development checklist
• [ ] I have followed the perfect PR recommendations
• [ ] The code has been formatted using Ruff (ruff format homeassistant tests)
• [ ] Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• [ ] Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• [ ] The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• [ ] New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
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To help with the load of incoming pull requests:

• [ ] I have reviewed two other open pull requests in this repository.

[bdraco]

Its still failing unfortunately.

[bdraco]

reverted the original version and came up with a smaller, better fix in https://github.com/home-assistant/core/pull/110766

[bdraco]

No changes here since the last review besides merging in dev.

[bdraco]

Thanks!