templater: fix reading of templates in frozen binaries with py3 < 3.7
When using a frozen binary with py3 < 3.7, there's no
`importlib.resources` module, so we use the code path that reads the
resources from the file system. That code path expects bytes for
package name and resource name.
Differential Revision: https://phab.mercurial-scm.org/D9008
BasedOnStyle: LLVM
IndentWidth: 8
UseTab: ForIndentation
BreakBeforeBraces: Linux
AllowShortIfStatementsOnASingleLine: false
IndentCaseLabels: false
AllowShortBlocksOnASingleLine: false
AllowShortFunctionsOnASingleLine: false
IncludeCategories:
- Regex: '^<'
Priority: 1
- Regex: '^"'
Priority: 2