See gh-25282

Closes gh-24836

See gh-25292

See gh-25291

See gh-25290

See gh-25289

See gh-25286

See gh-25285

See gh-25284

See gh-25283

See gh-25282

See gh-25281

See gh-25280

* pr/25266:
  Update copyright of changes files
  Polish

Closes gh-25266

See gh-25266

See gh-25266

Closes gh-24894

Closes gh-25257

Previously, UpgradeApplicator would open build.gradle
using open options that left the fields existing content intact. It
would then write the new content at the beginning of the file. If
the new content was n bytes shorter than the existing content, this
would leave n bytes of the existing content at the end of the file.

This commit updates UpgradeApplicator to truncate the existing file
when it opens it. This ensures that the existing content is
completely replaced by the new content, irrespective of their lengths.

Closes gh-25256

Closes gh-25226

Closes gh-25225

Closes gh-25224

Closes gh-25223

Closes gh-25222

Closes gh-25220

Closes gh-25219

Closes gh-25218

Closes gh-25217

Closes gh-25216

Closes gh-25215

Closes gh-25214

Closes gh-25213

Closes gh-25212

Closes gh-25211

Closes gh-25210

Closes gh-25209