Remove unneeded pre-OTA BLE disable from Firmware Update

[bharvey88]

Version: 26.7.9.1 (no change — part of the single release)

What does this implement/fix?

Removes the logic that dropped the BLE stack before an OTA and re-enabled/re-applied the scan afterward, from the Firmware Update button.

Verified on hardware: the unified build (~21% RAM at rest, ~260 KB free) completes the TLS firmware download with the Bluetooth proxy still active, so freeing RAM by disabling BLE first isn't needed. The proxy now stays up through the update — simpler flow, no BLE interruption.

Kept the two delay steps (manifest-fetch timing). The delay: 3s previously let the BLE disable settle; it's a harmless brief pause now — happy to drop it too if you'd prefer.

Types of changes

• Bugfix (fixed change that fixes an issue)
• New feature (thanks!)
• Breaking change (repair/feature that breaks existing functionality)
• Dependency Update - Does not publish
• Other - Does not publish
• Website of github readme file update - Does not publish
• Github workflows - Does not publish

Checklist / Checklijst:

• The code change has been tested and works locally
• The code change has not yet been tested

If user-visible functionality or configuration variables are added/modified:

• Added/updated documentation for the web page

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 5661dc09-631e-420c-84bb-183266e6bbcf

📥 Commits

Reviewing files that changed from the base of the PR and between bd24876 and 9de835c.

📒 Files selected for processing (1)

• Integrations/ESPHome/Core.yaml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch remove/ble-stop-before-ota

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