terminal.integrated.suggest.providers should suggest all providers

[Tyriar]

We want this to give all valid suggestions:

You can see how defaultProfile does this dynamically here:

vscode/src/vs/platform/terminal/common/terminalPlatformConfiguration.ts

Lines 396 to 403 in 8081bc3

	[TerminalSettingId.DefaultProfileLinux]: {
	restricted: true,
	markdownDescription: localize('terminal.integrated.defaultProfile.linux', "The default terminal profile on Linux."),
	type: ['string', 'null'],
	default: null,
	enum: detectedProfiles?.os === OperatingSystem.Linux ? profileEnum?.values : undefined,
	markdownEnumDescriptions: detectedProfiles?.os === OperatingSystem.Linux ? profileEnum?.markdownDescriptions : undefined
	},

Note that registerTerminalDefaultProfileConfiguration is called whenever the value could possibly change:

vscode/src/vs/workbench/contrib/terminal/browser/terminalProfileService.ts

Lines 202 to 206 in 8081bc3

	private async _refreshPlatformConfig(profiles: ITerminalProfile[]) {
	const env = await this._remoteAgentService.getEnvironment();
	registerTerminalDefaultProfileConfiguration({ os: env?.os || OS, profiles }, this._contributedProfiles);
	this._refreshTerminalActionsDisposable.value = refreshTerminalActions(profiles);
	}

It may be necessary to register it early without the enum information and when extensions are ready re-register the config.