UI: Check VC++ Runtime version on startup

[derrod]

Description

Adds a check on startup that ensures a compatible Visual C++ runtime is being used.

The user is given the option to automatically open our existing VC runtime download page (https://obsproject.com/visual-studio-2019-runtimes),

Motivation and Context

Due to backwards-incompatible changes in MSVC 14.40 OBS crashes on startup for some users that do not have up to date runtimes installed. See #10799.

We should also adjust the updater and installer to check for these older versions, but that will be a larger undertaking and also does not cover the use case of portable ZIPs (unlike this PR).

How Has This Been Tested?

Tested on Windows VM with outdated vc runtime:

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[notr1ch]

Perhaps the wording could be changed to "You will now be directed to the download page." with OK / Cancel buttons. Currently it's unclear that pressing "No" will exit OBS.

[derrod]

I updated the wording (not the screenshot though). I also wasn't super happy with it, but I didn't have any better ideas. Perhaps @Warchamp7 has a suggestion as well.

Either way I'd like to have this for beta2 (alongside the updater/installer changes) so we can mitigate the VC runtime mess as much as possible.

[RytoEX]

Maybe there's a better way to handle this, but if we figure that out, we can make further changes later. Let's mitigate this as much as we can.

[wang-bin]

I my project I find out the std::mutex is incompatible with old msvcp140.dll, I tested with the simplest mutext code. Adding -D_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR can fix the incompatibility

[RytoEX]

I my project I find out the std::mutex is incompatible with old msvcp140.dll, I tested with the simplest mutext code. Adding -D_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR can fix the incompatibility

We considered this and decided against it.