testsuite: handle icc and icpc deprecated remarks

testsuite: handle icc and icpc deprecated remarks

Starting with icc/icpc version 2021.7.0 and higher both compilers emit a
deprecation remark when used.  E.g.

  >> icc --version
  icc: remark #10441: The Intel(R) C++ Compiler Classic (ICC) is
  deprecated and will be removed from product release in the second half
  of 2023. The Intel(R) oneAPI DPC++/C++ Compiler (ICX) is the recommended
  compiler moving forward. Please transition to use this compiler. Use
  '-diag-disable=10441' to disable this message.
  icc (ICC) 2021.7.0 20220713
  Copyright (C) 1985-2022 Intel Corporation.  All rights reserved.

  >> icpc --version
  icpc: remark #10441: The Intel(R) C++ Compiler Classic (ICC) is
  deprecated ...
  icpc (ICC) 2021.7.0 20220720
  Copyright (C) 1985-2022 Intel Corporation.  All rights reserved.

As the testsuite compile fails when unexpected output by the compiler is
seen this change in the compiler breaks all existing icc and icpc tests.
This patch makes the gdb testsuite more forgiving by a) allowing the
output of the remark when trying to figure out the compiler version
and by b) adding '-diag-disable=10441' to the compile command whenever
gdb_compile is called without the intention to detect the compiler.

Approved-By: Tom Tromey <tom@tromey.com>