[clang] [analyzer] Fix crash in RegionStoreManager::bindArray from constructor array-to-pointer decay (PR #210649)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

> @NagyDonat Could you please have a look at this and measure this change? Looks correct to me but I want to be 100% sure it's actually good.

I started a CI run that analyzes a dozen open source projects with this revision (comparing it to its parent on the main branch).

The change LGTM overally if you follow the [the suggestion to add an assertion](https://github.com/llvm/llvm-project/pull/210649#discussion_r3614802560) and silence the windows-specific test failures (e.g. by pinning the target triple).

https://github.com/llvm/llvm-project/pull/210649