update changelog for v0.51.1

[EGD-5022] Fix invalid open flags in vfscore

Opening file with O_CREAT mode on the mounted fat filesystem
should create file if doesn't exist. Currently it returns ENOENT
This path fix this issue. ff_fat create flags are fixed.

[EGD-5016] Fix vfs-littlefs failed mount init

Fix issue with memory leak during mount in littlefs core
when mount fails.

[EGD-4758] Add lfs object state sync

Add lfs object state sync.

[EGD-4758] Fix includes in littlefs

Fix includes in the littlefs

[EGD-4758] Add block size and fs size

Add blocks size and blocks count detecting
of the file size.

[EGD-4758] Fix littlefs directory iterator

Directory iterator now seams to be working

[EGD-4758] Add unit tests for littlefs

Some tests passed but it needs some work...

[EGD-4758] Fix littlefs boundary check

    Currently littlefs boudary is checked in the wrong place
    this commit fix this issue

[EGD-4758] Add Littlefs unit test

This is an initial implementation of littlefs
unit tests

[EGD-4758] Add Littlefs config

Add littlefs config
Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>

[EGD-4758] Add littlefs core filesystem

Filesystem completed

[EGD-4758] Add littlefs in the core rt1051 build fix

Fix wrong build

Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>

[EGD-4758] Add Filesystem lfs fixes

This is a fix commit which fix lfs
problem with implementation

[EGD-4758] Add Littlefs file operations

All littlefs file operations seams to be completed

[EGD-4758] Add Littlefs fuse

Littlefs fuse work in progress

[EGD-4758] Add Littlefs in the vfscore

Initial concept commit

[EGD-4732] "All Operators" menu option is shown when "Operator auto-select" is off; the state is kept in db
[EGD-4732] Network menu items visibility / indentation

Fix typo

[EGD-4534] Change audio data path synchronization

Refactor audio data path to fix several synchronization issues and
excessive copy operations on large memory blocks. Introduce
audio::Stream data structure to allow connecting audio source and sink
with a zero-copy capability.

Introduce system mechanisms:
 - critical section guard lock needed for stream synchronization
 - non-cacheable memory allocator to allocate memory for DMA safe
   buffers

Update the Googletest CMake template to match the capabilities of the
Catch2 template.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>
Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@mudita.com>