Add synchronous GetLatestVersion method.

[jmoro3]

The methoв could be used in special cases when the method
has to run synchronously in one thread.

Relates-To: OAM-1422
Signed-off-by: Iuliia Moroz ext-iuliia.moroz@here.com

[codecov]

Codecov Report

Merging #1315 (76d2afa) into master (8c6a8a5) will decrease coverage by 0.0%.
The diff coverage is 0.0%.

@@ Coverage Diff @@## master #1315 +/- ##
========================================
- Coverage 86.1% 86.1% -0.0% 
========================================
Files 381 381 Lines 13430 13443 +13 ========================================
+ Hits 11568 11573 +5 - Misses 1862 1870 +8 

Impacted Files	Coverage Δ
...-read/include/olp/dataservice/read/CatalogClient.h	100.0% <ø> (ø)
...ead/include/olp/dataservice/read/VersionsRequest.h	100.0% <ø> (ø)
olp-cpp-sdk-dataservice-read/src/CatalogClient.cpp	84.0% <0.0%> (-7.3%)	⬇️
...cpp-sdk-dataservice-read/src/CatalogClientImpl.cpp	87.2% <0.0%> (-5.9%)	⬇️
...p-cpp-sdk-dataservice-read/src/CatalogClientImpl.h	100.0% <ø> (ø)
olp-cpp-sdk-core/src/client/PendingUrlRequests.cpp	95.5% <0.0%> (+0.2%)	⬆️

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