Fix clippy lint 'suspicious_open_options'

[MarkusPettersson98]

This PR fixes clippy lint suspicious_open_options added in 1.75.

truncate(false) is supposedly the default behavior, but maybe we want to change this to true. Thoughts?

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This change is 

[dlon]

Reviewed 3 of 3 files at r1, all commit messages.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @MarkusPettersson98)

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mullvad-exclude/src/main.rs line 98 at r1 (raw file):

        .write(true)
        .create(true)
        .truncate(false)

This is likely correct.

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talpid-core/src/split_tunnel/linux.rs line 117 at r1 (raw file):

            .write(true)
            .create(true)
            .truncate(false)

This is likely correct.

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talpid-core/src/split_tunnel/linux.rs line 177 at r1 (raw file):

            .write(true)
            .create(true)
            .truncate(false)

This is likely correct.

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test/test-runner/src/sys.rs line 181 at r1 (raw file):

    let mut file = tokio::fs::OpenOptions::new()
        .create(true)
        .truncate(false)

Truncating seems correct here, right? We want to wipe all existing overrides.

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test/test-runner/src/sys.rs line 413 at r1 (raw file):

    let mut file = tokio::fs::OpenOptions::new()
        .create(true)
        .truncate(false)

Ditto.

[MarkusPettersson98]

Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @dlon)

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test/test-runner/src/sys.rs line 181 at r1 (raw file):

Previously, dlon (David Lönnhager) wrote…

Truncating seems correct here, right? We want to wipe all existing overrides.

Yes, we do. So we should truncate :)

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test/test-runner/src/sys.rs line 413 at r1 (raw file):

Previously, dlon (David Lönnhager) wrote…

Ditto.

Yes, we do. So we should truncate :)

[dlon]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved