docs, ctest break, serverMain, e2e, clang version format-check update

[joaomarques90]

native docs --> update and improvement of the doc && Flag '-a' in shortopts (ServerMain.cpp.120) but not addressed, causing it to break. Presented all flags options.

ctest --> comment truncate exception (MmapVectorImpl.h.34) [previously questioned if it did matter]. Previously 6 tests failed.

serverMain --> server arguments valid verification (options_value > 0) && new value for threads: max_threads_concurrency ("-j -1")

e2e --> upgrade for paths contaning spaces

format-check --> update for clang-13

Local Native Run/Tested on Ubuntu 20.04.3 LTS via WSL2

[hannahbast]

@joaomarques90 Thank you for this PR. You opened a second PR (522) which is very similar. You can (and should) update this PR (by pushing to the underlying branch).

[joka921]

Can you please split this up into a PR that only does the necessary changes to make it work in your setup
(the quotation marks in the bash script, and the Removal of the "truncate" command in MmapVectorImpl.h .

The reworking of ServerMain.cpp is done in another PR by me (we integrate an alternative to getopt) making your (reasonable) suggestions obsolete.

The native-setup.md is completely outdated, and we have to think about either rewriting it or throwing it out, so this is also not relevant for now.

The change to clang-format-13 also should be (if we want to do this) a different PR, since it requires reformatting of the
complete codebase. Why did you suggest this?

[joaomarques90]

The change to clang-format-13 also should be (if we want to do this) a different PR, since it requires reformatting of the
complete codebase. Why did you suggest this?

Sorry for the late response, I just saw it now.
I have suggested that clang-format version because I have seen this:

qlever/.github/workflows/cmake.yml

Line 40 in b16a83c

- name: Install clang 13

Therefore, it made me believe (since it is in cmake workflow) that the format-check.sh should contain that version as well.