Some clang tidy fixes

[riemass]

Related #1435

This clears 3 bugprone checks:
-bugprone-move-forwarding-reference - fixed,
-bugprone-macro-parentheses - tried putting parentheses, it broke our solution. Just ignoring it for now seems reasonable,
-bugprone-easily-swappable-parameters - ignoring it as discussed, since we have multiple occurrences of this and sub-typing every time would complicate stuff.

[Neverlord]

👍

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.06% 🎉

Comparison is base (b618678) 65.91% compared to head (bce338e) 65.97%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1512      +/-   ##
==========================================
+ Coverage   65.91%   65.97%   +0.06%     
==========================================
  Files         636      636              
  Lines       27064    27064              
  Branches     2954     2955       +1     
==========================================
+ Hits        17839    17856      +17     
+ Misses       7696     7683      -13     
+ Partials     1529     1525       -4     

Files Changed	Coverage Δ
libcaf_core/caf/config_value.hpp	68.94% <100.00%> (ø)
libcaf_core/caf/flow/op/concat.hpp	78.75% <100.00%> (ø)
libcaf_core/caf/policy/select_all.hpp	91.48% <100.00%> (ø)

... and 10 files with indirect coverage changes

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