ansible: add gcc-toolset-10-libatomic-devel on RHEL8

[richardlau]

V8 CI requires libatomic.

---

e.g. https://ci.nodejs.org/job/node-test-commit-v8-linux/5239/nodes=rhel8-s390x,v8test=v8test/console

13:42:18 FAILED: torque 
13:42:18 python3 "../../build/toolchain/gcc_link_wrapper.py" --output="./torque" -- g++ -pie -Werror -Wl,--fatal-warnings -Wl,--build-id -fPIC -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -m64 -rdynamic -Wl,-z,defs -Wl,--as-needed -pie -Wl,--disable-new-dtags -Wl,-O2 -Wl,--gc-sections -o "./torque" -Wl,--start-group @"./torque.rsp"  -Wl,--end-group  -latomic -ldl -lpthread -lrt
13:42:18 /opt/rh/gcc-toolset-10/root/usr/bin/ld: cannot find -latomic
13:42:18 collect2: error: ld returned 1 exit status

[richardlau]

I've deployed onto the rhel8-s390x and rhel8-ppc64le machines. Test build has revealed we need a V8 backport for gcc-10 which I'll identify and open after this.
e.g. https://ci.nodejs.org/job/node-test-commit-v8-linux/5241/nodes=rhel8-s390x,v8test=v8test/console

15:39:58 In file included from ../../test/cctest/compiler/test-operator.cc:8:
15:39:58 ../../src/compiler/operator.h: In function ‘void v8::internal::compiler::TestTestOperator1double_Equals()’:
15:39:58 ../../src/compiler/operator.h:185:23: error: array subscript 6 is outside array bounds of ‘v8::internal::compiler::Operator [1]’ [-Werror=array-bounds]
15:39:58   185 |     return this->pred_(this->parameter(), that->parameter());
15:39:58       |            ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
15:39:58 ../../test/cctest/compiler/test-operator.cc:213:12: note: while referencing ‘op3’
15:39:58   213 |   Operator op3(25, NONE, "Weepy", 0, 0, 0, 0, 0, 0);
15:39:58       |            ^~~

Waiting for the builds currently running on the rhel8-x64 machines to finish before deploying the change there as well (although the V8 CI currently doesn't run on those as the builds take a lot longer than on the benchmark machine (which is currently down)).

[richardlau]

Test build has revealed we need a V8 backport for gcc-10 which I'll identify and open after this.

Backport PR: nodejs/node#47236

[mhdawson]

LGTM