Don't send sentry mapping files from local machines

[wzieba]

Description

When building release on local machine, we shouldn't send debug files to Sentry as it's not needed: clutters the Sentry dashboard and slows down the local build. This tiny PR addresses this problem.

Testing

1. ./gradlew assembleJetpackVanillaRelease does not send debug files (see console output)
2. CI=true ./gradlew assembleJetpackVanillaRelease sends debug files

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21452-79fe4cb
	Commit	79fe4cbc8a02080c9c1b1096a63237a2eec1da1c
	Direct Download	jetpack-prototype-build-pr21452-79fe4cb.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21452-79fe4cb
	Commit	79fe4cbc8a02080c9c1b1096a63237a2eec1da1c
	Direct Download	wordpress-prototype-build-pr21452-79fe4cb.apk

Note: Google Login is not supported on these builds.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud