Build(deps): Bump third_party/yosys from b89bd02 to 98b4aff (#2681)

Bumps [third_party/yosys](https://github.com/YosysHQ/yosys) from
`b89bd02` to `98b4aff`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/YosysHQ/yosys/commit/98b4affc4a03d65e2fb3e0854f2e916e3f75e5d6"><code>98b4aff</code></a>
Bump version</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/29e8812bab3499da1868794568cfc2fe6b1ed1ee"><code>29e8812</code></a>
Merge pull request <a
href="https://redirect.github.com/YosysHQ/yosys/issues/4724">#4724</a>
from YosysHQ/micko/blackbox_verific</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/9512ec4bbc73cfc851d2e1d9377eafe89326fb3f"><code>9512ec4</code></a>
Merge pull request <a
href="https://redirect.github.com/YosysHQ/yosys/issues/4764">#4764</a>
from YosysHQ/micko/verific_vhdl_assert</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/d6bd521487944ded68d8590295581f178d94437a"><code>d6bd521</code></a>
verific : VHDL assert DFF initial value set on Verific library patch
side</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/4b3c03dabcae29882dc66de475a0947c2ed435cd"><code>4b3c03d</code></a>
Bump version</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/18b616578a05e49d87e02530692e8d63338522cd"><code>18b6165</code></a>
pyosys: catch boost::python::error_already_set</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/5b6baa3ef1a34b9cb0dd38d82a6ecdd3180d285f"><code>5b6baa3</code></a>
Merge pull request <a
href="https://redirect.github.com/YosysHQ/yosys/issues/4744">#4744</a>
from YosysHQ/emil/clockgate-liberty</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/53a4ec375b089fb7c325e57b1b7bf312b5928d26"><code>53a4ec3</code></a>
Merge pull request <a
href="https://redirect.github.com/YosysHQ/yosys/issues/4762">#4762</a>
from georgerennie/george/fix_read_ilang_test</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/9043dc0ad6c5caf39797a34c457ba971103f7016"><code>9043dc0</code></a>
tests: replace read_ilang with read_rtlil</li>
<li><a
href="https://github.com/YosysHQ/yosys/commit/56b80bdd222012dbe9193369dadec40a1a2d5d83"><code>56b80bd</code></a>
Merge pull request <a
href="https://redirect.github.com/YosysHQ/yosys/issues/4448">#4448</a>
from georgerennie/shiftadd_gating</li>
<li>Additional commits viewable in <a
href="https://github.com/YosysHQ/yosys/compare/b89bd027a069dc93a6eab82dd55217c733797f33...98b4affc4a03d65e2fb3e0854f2e916e3f75e5d6">compare
view</a></li>
</ul>
</details>
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