Fix ebpfTests.sysEbpf_null_attr, ebpfTests.sysEbpf_create_map,
ebpfMapTests.int_key_int_value, ebpfMapTests.int_key_struct_value
by running Docker as privileged on Azure Pipelines.

Docker is used only to get a new distribution running, it's not used
for any security purpose, so there's no point in limiting it.

Do not checkout with carriage returns on Windows, otherwise it would
mess up with code that expect unix style files.

Fix UsersTest.test_sanity on Windows.

uid and gid were returned as int (while they normally are unsigned int)
and converted to signed integers in the table row.
This is wrong because beyond uid and gid not being ints,
they are taken from the RID part of the SID which in some cases,
like for a Service SID, it can have a value higher than then maximum
value of an int, so in the end the number shown in table is negative.

Now they are returned as uint32_t and converted as BIGINTs for the table
that uses them.

Fix other functions return values and conversions depending on the meaning of
the value.
On Windows stick to its specific types where possible.

Convert CRLF to LF on some of the files modified.

The table it tests has several issues, it doesn't properly check
for errors in several places and returns unexpected values in
the columns.
Moreover the code could also be improved to make testing possible
without passing through SQL queries, by separating the part
that uses WMI queries from the conversion to row results.

The code was failing on Windows because the '\Windows\%' pattern
is relative and presumes that the Windows folder is on the same
drive (C:\) as the test process.
This might not be true, so we find where precisely is the Windows
directory and use the full path to it as a pattern.

The failing test checks that were testing the equal and LIKE operator
have been moved to a new test, test_table_constraints, since they
are not related to joins.