fix: add missing click dependency

Click is used in parts of the CI scripts (see run_config/fvp-linux.tc
for instance), add it back as part of a new dependency group. Future
dependencies that are required only in CI should be added to the
``ci`` dependency group.

Change-Id: I5da7fea703495dd4006d86334626f126a850bb10
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/poetry.lock b/poetry.lock
index 0eb4785..58522c9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -841,4 +841,4 @@
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "79681baa18d1971b35833631ce5b0ad457fa285237853c953010a3502bb7b755"
+content-hash = "07432d506e3dc69114203b554d82c1489372ce0087d4a430d0380e437afa5714"
diff --git a/pyproject.toml b/pyproject.toml
index 7d748c5..b99f777 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,3 +16,5 @@
 sphinx-rtd-theme = "^1.1.1"
 pip-tools = "^6.4.0"
 
+[tool.poetry.group.ci.dependencies]
+click = "^8.1.3"