nir: add an assertion for infinite recursion in 'place_phi_read'

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111070
Signed-off-by: Andrii Simiklit <andrii.simiklit@globallogic.com>
13 jobs for !1352 with spirv_infinity_loop in 8 minutes and 56 seconds (queued for 2 seconds)
latest detached
Status Job ID Name Coverage
  Containers Build
passed #471695
debian

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  Build+Test
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meson-arm64

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meson-armhf

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meson-clang

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meson-clover

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meson-i386

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meson-main

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meson-swr-glvnd

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meson-vulkan

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scons-llvm

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scons-nollvm

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scons-swr

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scons-win64

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