Website: Direct users signing up for sandbox to test MDM features to contact us (#11199)

closes: #11186

Changes:
- Added a banner to the sandbox registration page to direct users who
are signing up to test MDM features to schedule a meeting with us
.

website/assets/styles/pages/try-fleet/register.less

@@ -24,6 +24,23 @@
   input::placeholder {
     color: #8B8FA2;
   }
+  [purpose='sandbox-mdm-note'] {
+    padding: 16px 24px;
+    background: #F1F0FF;
+    border: 1px solid #B4B2FE;
+    box-shadow: 0px 3px 4px rgba(25, 33, 71, 0.22);
+    border-radius: 8px;
+    margin-bottom: 24px;
+    p {
+      line-height: 17px;
+      font-weight: 700;
+      color: #515774;
+    }
+    a {
+      font-weight: 400;
+      text-decoration: none;
+    }
+  }
   [purpose='sandbox-image'] {
     width: 300px;
     margin-right: 65px;

website/views/pages/try-fleet/register.ejs

@@ -8,6 +8,9 @@
       <p class="pt-3">
         The fastest way to test Fleet. Get up and running in minutes. Ready for production deployments? <a href="https://fleetdm.com/docs/deploying">Learn how to deploy Fleet</a>.
       </p>
+      <div purpose="sandbox-mdm-note" class="d-flex flex-column">
+        <p class="mb-0">Interested in testing Fleet’s MDM capabilities? <a target="_blank" href="https://calendly.com/d/ykd-hqy-p7t/chat-with-fleet">Meet with us to learn more</a></p>
+      </div>
       <div class="pt-3">
         <ajax-form :handle-submitting="handleSubmittingRegisterForm" :syncing.sync="syncing" :cloud-error.sync="cloudError" :form-errors.sync="formErrors" :form-data="formData" :form-rules="formRules" @submitted="submittedRegisterForm()">
           <div class="form-group mb-3">