[LTP] thermal: add new test group

[linuxtestproject.agent@gmail.com]

Hi Piotr,

On Tue, 28 Apr 2026, Piotr Kubaj wrote:
> thermal: add new test group

> +# Copyright (c) 2025, Intel Corporation. All rights reserved.

Year should be 2026 (new file).

[...]

> +	FILE *fp = SAFE_FOPEN("/proc/interrupts", "r");
> [...]
> +			if (ptr == endptr)
> +				tst_brk(TBROK, "CPU %d: interrupt not found", i);
> +
> +			if (errno == ERANGE)
> +				tst_brk(TBROK, "CPU %d: interrupt out of range", i);

Both tst_brk() calls fire before SAFE_FCLOSE(fp). Close fp before calling
tst_brk() to avoid leaking the file descriptor.

[...]

> +		sleep(sleep_time--);

Sleep-based synchronization is not allowed (G2). Replace with a polling
loop using short yields or TST_RETRY_FUNC.

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