shim: Initial support for KVM_SIGNAL_MSI

[softickllc]

Added code for KVM_SIGNAL_MSI ioctl.

[codecov]

Codecov Report

Merging #118 (2a8096b) into irqchip (2ec8738) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 2a8096b differs from pull request most recent head a50802c. Consider uploading reports for the commit a50802c to get more accurate results

@@            Coverage Diff             @@
##           irqchip      #118    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          210       210            
  Lines         6922      6718   -204     
  Branches       156       146    -10     
==========================================
- Hits          6922      6718   -204     

Impacted Files	Coverage Δ
shim/src/handle_vm_kvm_signal_msi.c	100.00% <100.00%> (ø)
shim/tests/src/test_handle_vm_kvm_signal_msi.cpp	100.00% <100.00%> (ø)
hypercall/mocks/mv_hypercall.h	100.00% <0.00%> (ø)
shim/src/handle_vm_kvm_irqfd.c	100.00% <0.00%> (ø)
shim/tests/include/helpers.hpp	100.00% <0.00%> (ø)
shim/src/handle_vcpu_kvm_get_lapic.c	100.00% <0.00%> (ø)
shim/src/handle_vcpu_kvm_set_lapic.c	100.00% <0.00%> (ø)
shim/src/handle_vm_kvm_create_pit2.c	100.00% <0.00%> (ø)
shim/src/handle_vm_kvm_get_irqchip.c	100.00% <0.00%> (ø)
shim/src/handle_vm_kvm_set_irqchip.c	100.00% <0.00%> (ø)
... and 8 more