Remove the definition of NDEBUG from CMakeLists.txt.

Define MEB_DEBUG_ASSERT() and MEB_ASSERT_ABORT().

Change assert() to MEB_ASSERT() or MEB_DEBUG_ASSERT().
Change ut_ad() to MEB_ASSERT() or MEB_DEBUG_ASSERT().
Change ut_a() to MEB_ASSERT().
Change ut_error() to abort().

Optimize image post file header generation.

Avoid a debug assert in read_tablespace_header().

Rename lock_tables() to flush_tables_for_export().

Avoid global class object 'free_pages_bitmap_container'.

Remove unused code around PERF_TEST.

Avoid a debug assert in the redo log parsing.

Avoid exceptions when destructing free_pages_bitmap_container.

Disable InnoDB code via UNIV_HOTBACKUP, that has irrelevant asserts
for mysqlbackup.

To track down a failure in InnoDB code shorten some trace logs.

Extend MEB version string with details about the debug configuration.
Add a test, that show the version of mysqlbackup.

RB#25816