scripted-diff: Use inline constexpr over plain constexpr

Both are identical since C++17 and this refactor shouldn't change any
behavior. The benefits are consistency and to be explicit, to avoid
confusion with the C++11/14 constexpr.

Co-Authored-By: l0rinc <pap.lorinc@gmail.com>

-BEGIN VERIFY SCRIPT-
 sed -i --regexp-extended 's/^constexpr \S+ \w+(\[\])? ?[={]/inline &/' $( \
     git grep -l '^constexpr ' -- \
       '*.h' \
       ':(exclude)src/minisketch' \
 )
-END VERIFY SCRIPT-

src/node/utxo_snapshot.h

@@ -125,7 +125,7 @@ std::optional<uint256> ReadSnapshotBaseBlockhash(fs::path chaindir)
 
 //! Suffix appended to the chainstate (leveldb) dir when created based upon
 //! a snapshot.
-constexpr std::string_view SNAPSHOT_CHAINSTATE_SUFFIX = "_snapshot";
+inline constexpr std::string_view SNAPSHOT_CHAINSTATE_SUFFIX = "_snapshot";
 
 
 //! Return a path to the snapshot-based chainstate dir, if one exists.