Replace boost end_with and starts_with by C++20 std::string built in functions

[thomashampson]

Description of work

Since our move to C++20, the string functions starts_with and ends_with are now available as part of std::string. Here we replace all instances of the boost equivalents. Note that the case insensitive versions (istarts_with and iends_with) have not been replaced because there isn't a suitable STL alternative.

Summary of work

Things that had to be done as part of this work:

• replace the boost ends_with and starts_with with the STL versions
• remove the headers from places where they're not needed
• add headers to places where they are needed
• fix cppcheck defects where the lines numbers have changed w.r.t. the suppressions file

There is no associated issue.

To test:

Check that the changes are all sensible. Check the codebase for any missed instances of boost::algorithm::starts_with or boost::algorithm::ends_with.

This does not require release notes because it's code maintenance.

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[robertapplin]

Nice improvement to the code, just had a few quick questions