Fix Bugzilla 24685 - std.stdio.File.rawRead allows reading raw pointe…

[ntrel]

…rs from files in @safe code

[dlang-bot]

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	24685	major	std.stdio.File.rawRead allows reading raw pointers from files in @safe code

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + phobos#9030"

[ntrel]

Rebased but buildkite style check still failing with warnings about std.range. And ldc CMake error now too.