Don't execute git hooks if you create branch as part of other change

What does this MR do?

Currently, our procedure for adding a commit requires us to execute CreateBranchService before file creation. It's OK, but also we do execute git hooks (the PostReceive sidekiq job) as part of this process. However, this hook is execute before the file is actually committed, so the ref is updated.

Secondly, we do execute a git hooks after committing file and updating ref. This results in duplicate PostReceive jobs, where the first one is completely invalid.

This change makes the branch creation, something that is intermediate step of bigger process (file creation or update, commit cherry pick or revert) to not execute git hooks.

Why was this MR needed?

Adds a to CreateBranchService an option to disable hooks execution.

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23439

app/assets/fonts/OFL.txt

-Copyright 2010, 2012, 2014 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
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-This Font Software is licensed under the SIL Open Font License, Version 1.1.
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-This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL
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------------------------------------------------------------
-SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
------------------------------------------------------------
-
-PREAMBLE
-The goals of the Open Font License (OFL) are to stimulate worldwide
-development of collaborative font projects, to support the font creation
-efforts of academic and linguistic communities, and to provide a free and
-open framework in which fonts may be shared and improved in partnership
-with others.
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-The OFL allows the licensed fonts to be used, studied, modified and
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-fonts, including any derivative works, can be bundled, embedded, 
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-however, cannot be released under any other type of license. The
-requirement for fonts to remain under this license does not apply
-to any document created using the fonts or their derivatives.
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-DEFINITIONS
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-Holder(s) under this license and clearly marked as such. This may
-include source files, build scripts and documentation.
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-distributed by the Copyright Holder(s).
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-"Modified Version" refers to any derivative made by adding to, deleting,
-or substituting -- in part or in whole -- any of the components of the
-Original Version, by changing formats or by porting the Font Software to a
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