Automatically enable built-in repos

[matejminar]

Whenever a new Electron project gets created, we should automatically enable iOS, Microsoft, and Electron debug symbol built-in repos.

Usually, these settings can be found here: https://sentry.sentry.io/settings/projects/javascript/debug-symbols/

Slack.

[jan-auer]

Regardless of the current epoch's default, the option sentry:builtin_symbol_sources should be set to ["ios", "microsoft", "electron"].

The actual defaults are here and include symbol servers that need not be enabled for an electron project:

sentry/src/sentry/projectoptions/defaults.py

Lines 59 to 70 in aaa1fa6

	# Default symbol sources. The ios source does not exist by default and
	# will be skipped later. The microsoft source exists by default and is
	# unlikely to be disabled.
	register(
	key="sentry:builtin_symbol_sources",
	epoch_defaults={
	1: ["ios"],
	2: ["ios", "microsoft"],
	5: ["ios", "microsoft", "android"],
	9: ["ios", "microsoft", "android", "nuget"],
	},
	)