<istream>/<ostream> : seekg() and seekp() must catch and rethrow internal io exceptions

[calvincramer]

Describe the bug
seekg() and seekp() must catch and rethrow internal io exceptions. If an internal io exception occurs, the bad bit must be set:
See: http://www.cplusplus.com/reference/istream/istream/seekg/ at the bottom in the "Exception Safety" section.

Expected behavior
seekg() and seekp() must catch and rethrow internal io exceptions.

STL version
current

• Option 2: git commit hash
  main

Additional context
Both llvm and gcc's c++ standard libraries do this:
https://github.com/google/libcxx/blob/master/include/istream#L1370
https://github.com/gcc-mirror/gcc/blob/master/libstdc%2B%2B-v3/include/bits/istream.tcc#L877

This issue was found from a boost iostreams test case: https://github.com/boostorg/iostreams/blob/develop/test/stream_state_test.cpp
Where a phony "error_device" implements internal io operations read(), write() and seek() which each throw an exception. These functions are ultimately called from seekg() and seekp() in istream and ostream.

[miscco]

I am currently writing some additional tests for the fixes

From what I understand we have bugs in

istream::sync
istream::seekg
istream::seekg
istream::tellg

ostream::flush
ostream::seekp
ostream::seekp
ostream::tellp