Merge pull request #23109 from seanm:misc-warnings

* Fixed clang -Wnewline-eof warnings
* Fixed all trivial clang -Wextra-semi and -Wc++98-compat-extra-semi warnings
* Removed trailing semi from various macros
* Fixed various -Wunused-macros warnings
* Fixed some trivial -Wdocumentation warnings
* Fixed some -Wdocumentation-deprecated-sync warnings
* Fixed incorrect indentation
* Suppressed some clang warnings in 3rd party code
* Fixed QRCodeEncoder::Params documentation.

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Co-authored-by: Alexander Smorkalov <alexander.smorkalov@xperience.ai>

modules/imgcodecs/include/opencv2/imgcodecs.hpp

@@ -319,8 +319,8 @@ See cv::imread for the list of supported formats and flags description.
 CV_EXPORTS_W Mat imdecode( InputArray buf, int flags );
 
 /** @overload
-@param buf
-@param flags
+@param buf Input array or vector of bytes.
+@param flags The same flags as in cv::imread, see cv::ImreadModes.
 @param dst The optional output placeholder for the decoded matrix. It can save the image
 reallocations when the function is called repeatedly for images of the same size.
 */