GH-47277: [C++] r-binary-packages nightly failures due to incompatibility with old compiler

[thisisnic]

Rationale for this change

The r-binary-packages job (specifically C++ Binary Linux OpenSSL 1.0 and 1.1) has been failing since 15th July with this error:

/arrow/cpp/src/parquet/encryption/encryption.h:175:62: error: use of deleted function 'arrow::util::SecureString::SecureString()'
         : column_path_(std::move(path)), encrypted_(encrypted) {}
                                                              ^
In file included from /arrow/cpp/src/parquet/encryption/encryption.h:26,
                 from /arrow/cpp/src/parquet/properties.h:30,
                 from /arrow/cpp/src/parquet/arrow/path_internal.cc:109:

What changes are included in this PR?

Remove the unconditional noexcept from SecureString’s default constructor so its exception specification now matches std::string’s on all libstdc++ versions.

Are these changes tested?

No but I'll run the failing CI job

Are there any user-facing changes?

No

• GitHub Issue: [R] r-binary-packages nightly failures #47277

[thisisnic]

@github-actions crossbow submit r-binary-packages

[github-actions]

Revision: 8a2d1b8

Submitted crossbow builds: ursacomputing/crossbow @ actions-da716f4052

Task	Status
r-binary-packages

[jonkeane]

What a simple fix! The GLib job is failing on main, this is good to go IMHO

Thanks for this!

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 135357c.

There weren't enough matching historic benchmark results to make a call on whether there were regressions.

The full Conbench report has more details.

[pitrou]

Wow, interesting that such a hack is needed for old gccs (version 8.3.1 apparently).

@EnricoMi FYI.

[pitrou]

And thank you @thisisnic for finding the fix!