[FIX] web: x2m open form dialog with the correct context

Before this commit, when you want to modify or add a record in a
non-editable x2many, the call to get_views to receive the arch for the
FormViewDialog did not contain a context.

Problem:
The arch of the form view that is received for adding or editing a
record in a non-editable x2many is not evaluated correctly.

Cause:
An empty context is passed to the "get_views" to receive the arch
for the FormViewDialog.

Solution:
We use the context of the StaticList that represents the x2many for
the "get_views".

Part-of: odoo/odoo#97558

addons/web/static/src/views/basic_relational_model.js

@@ -181,13 +181,14 @@ class DataPoint {
         if (params.__bm_load_params__) {
             this.__bm_load_params__ = params.__bm_load_params__;
             info = this.__bm_load_params__;
+            this.context = info.context;
         } else if (params.handle) {
             this.__bm_handle__ = params.handle;
             info = this.model.__bm__.get(this.__bm_handle__);
+            this.context = this.model.__bm__.localData[this.__bm_handle__].getContext();
         } else {
             throw new Error("Datapoint needs load params or handle");
         }
-        this.context = info.context;
         this.resModel = info.model || info.modelName;
         this.fields = info.fields;
         this.activeFields = {};

addons/web/static/src/views/fields/relational_utils.js

@@ -522,7 +522,7 @@ async function getFormViewInfo({ list, activeField, viewService, userService, en
     const comodel = list.resModel;
     if (!formViewInfo) {
         const { fields, relatedModels, views } = await viewService.loadViews({
-            context: {},
+            context: list.context,
             resModel: comodel,
             views: [[false, "form"]],
         });

addons/web/static/tests/views/fields/one2many_field_tests.js

@@ -5017,6 +5017,43 @@ QUnit.module("Fields", (hooks) => {
         }
     );
 
+    QUnit.test(
+        "one2many list not editable, the context is properly evaluated and sent",
+        async function (assert) {
+            assert.expect(3);
+            serverData.views = {
+                "turtle,false,form": '<form><field name="turtle_foo"/></form>',
+            };
+
+            await makeView({
+                type: "form",
+                resModel: "partner",
+                serverData,
+                arch: `
+                    <form>
+                        <field name="int_field"/>
+                        <field name="turtles" context="{'hello': 'world', 'abc': int_field}">
+                            <tree>
+                                <field name="turtle_foo"/>
+                            </tree>
+                        </field>
+                    </form>`,
+                resId: 1,
+                mockRPC(route, args) {
+                    if (args.method === "get_views" && args.model === "turtle") {
+                        const context = args.kwargs.context;
+                        assert.strictEqual(context.hello, "world");
+                        assert.strictEqual(context.abc, 10);
+                    }
+                },
+            });
+
+            await clickEdit(target);
+            await addRow(target);
+            assert.containsOnce(target, ".modal");
+        }
+    );
+
     QUnit.test("one2many with many2many widget: create", async function (assert) {
         assert.expect(10);