Add languages `yaml-textmate` & `yaml-tmlanguage`

[RedCMD]

Fixes https://github.com/redhat-developer/vscode-yaml/issues/1092

I could add them to "activationEvents" as well but the 3rd party extensions can activate this one instead via "extensionDependencies" https://github.com/redhat-developer/vscode-yaml/blob/e696d9b25153a8ce84b22738f01cbc931a3f87a2/package.json#L41-L44

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also I think *.y(a)ml is a invalid glob pattern https://github.com/redhat-developer/vscode-yaml/blob/e696d9b25153a8ce84b22738f01cbc931a3f87a2/src/extension.ts#L119